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Ocean field note

A body built to heal

The Starfish's Second Chance

If a starfish loses an arm to a hungry predator, it can often grow a brand new one back.

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How can losing a whole arm not be the end for a starfish?

starfish keeps important parts of its body, including branches of its digestive and nervous systems, spread out through each arm rather than packed only in the middle. That means if one arm is lost, the starfish's body can slowly direct cells to rebuild the missing limb over the following months, good as new. Starfish regrow lost parts using the very same patient, unhurried pace they use for everything else, including the long, slow effort it takes to pry open a stubborn shell for dinner.

Look for this

Explorer clue

In a tide pool, look for a starfish with one arm a little smaller than the rest, a sign it may be quietly regrowing.

Your turn to wonder

Curiosity question

If you could always grow back stronger after a hard moment, what would you feel braver trying?

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